Anyone using Ruth's Smart pots?

I'm wondering if the walls are too thin and if the light penetration is going to affect anything negatively.

Anyone have experience with these 'fabric' pots? It's my first time using them vs plastic.

http://www.amazon.com/Pack-Gallon-Fabric-Round-Ruths/dp/B00HL7YMLS/ref=sr_1_1?ie=UTF8&qid=1448690298&sr=8-1&keywords=fabric+pots

I'm using them in my current grow.
Compared to the smart pot brand they seem a little flimsy but the plants are doing well in them so far. The plants are all still in veg, from 5-8 weeks, and are very robust.

The roots are much more easily able to grow out of the pot, it seems, making transplantation more difficult.